FIX: Query Issued Against Two Instances of the Same Table May Cause an Access Violation (302421)

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Short Stack Dump
0058E28B Module(sqlservr+0018E28B) (CGenIndexStrategy::FColCovered(short,class CSet *)+0000003C)
00577F39 Module(sqlservr+00177F39) (CGenIndexStrategy::AssembleIndexJoin(int *,unsigned long,class COptExpr * *,class COptExpr * *,int *,enum JOINTYPE,class CCardVector *,class OptTypeVRSetArray * *,unsigned long *)+000005EE)
0056F615 Module(sqlservr+0016F615) (CGenIndexStrategy::FBuildNextSolution(class COptExpr * *,class COptExpr * *,int *,enum JOINTYPE,class CCardVector *,class OptTypeVRSetArray * *,unsigned long *)+0000054D)
0048BF1B Module(sqlservr+0008BF1B) (CImpRuleBaseJoinToIdxLookup::BuildSubstitutes(class COptExpr *,class CRuleContext *,class CRuleReturn *)+00000352)
00589104 Module(sqlservr+00189104) (CTask_ApplyRule::Perform(int)+00000268)
0058C939 Module(sqlservr+0018C939) (CMemo::ExecuteTasks(class COptTask *,int,int)+0000014D)
0058CF2D Module(sqlservr+0018CF2D) (CMemo::OptimizeQuery(class CQuery *,class COptExpr *,double *,int,int,struct s_OptimPlans *)+0000051A)
0058CADF Module(sqlservr+0018CADF) (COptContext::PexprSearchPlan(class COptExpr *)+00000155)
0055E100 Module(sqlservr+0015E100) (COptContext::PcxteOptimizeQuery(class COptExpr *,class DRgCId *)+00000B7A)
0055FFBB Module(sqlservr+0015FFBB) (CQuery::Optimize(void)+00000416)
0055FD54 Module(sqlservr+0015FD54) (CQuery::Optimize(unsigned long)+00000030)
005642C6 Module(sqlservr+001642C6) (CCvtTree::PqryFromTree(class TREE *,class IMemObj *,class CRangeCollection *,unsigned long,class CCompPlan *)+000002C4)
00564019 Module(sqlservr+00164019) (BuildQueryFromTree(class TREE *,class IMemObj *,class IMemObj *,class IQueryObj * *,class CRangeCollection *,unsigned long,class CCompPlan *)+00000046)
00563F78 Module(sqlservr+00163F78) (CStmtQuery::InitQuery(class CAlgStmt *,class CCompPlan *,unsigned long)+0000014B)
0049DA48 Module(sqlservr+0009DA48) (CStmtSelect::Init(class CAlgStmt *,class CCompPlan *,class IBrowseMode *)+00000091)
00447078 Module(sqlservr+00047078) (CCompPlan::FCompileStep(class CAlgStmt *,class CStatement * *)+00000AE7)
004510FE Module(sqlservr+000510FE) (CProchdr::FCompile(class CCompPlan *,class CParamExchange *)+00000D15)
00415080 Module(sqlservr+00015080) (CSQLSource::FTransform(class CParamExchange *)+0000037C)
004592CE Module(sqlservr+000592CE) (CSQLStrings::FTransform(class CParamExchange *)+000001A8)
0041534F Module(sqlservr+0001534F) (CSQLSource::Execute(class CParamExchange *)+00000176)
00459A54 Module(sqlservr+00059A54) (language_exec(struct srv_proc *)+000003C8)
004175D8 Module(sqlservr+000175D8) (process_commands(struct srv_proc *)+000000E0)
410735D0 Module(UMS+000035D0) (ProcessWorkRequests(class UmsWorkQueue *)+00000264)
4107382C Module(UMS+0000382C) (ThreadStartRoutine(void *)+000000BC)
7800BEA1 Module(MSVCRT+0000BEA1) (_beginthread+000000CE)
77E92CA8 Module(KERNEL32+00012CA8) (CreateFileA+0000011B)
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